シャドーイング練習: How One of the Universe’s Biggest Secrets Was Discovered - YouTubeで英語スピーキングを学ぶ
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- In the early hours of Sunday, September 14th, 2015, a scientist in Louisiana makes a fateful decision.
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- In the early hours of Sunday, September 14th, 2015, a scientist in Louisiana makes a fateful decision.
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- Robert Schofield has been working all weekend doing final calibrations.
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- All righty, let's take a spectrum.
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- He has one last test, - So let's see where this computer's getting its power.
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- But it's late, and the equipment is not cooperating.
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- It was about four or so in the morning, and we still had about another hour of work to do.
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And we were like, "Yeah, things aren't working so well and I'm really tired.
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Let's not do this last hour or so of work." - They call it a night.
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And 40 minutes later, in the silence of their inactivity, they open the door to history.
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A powerful gravitational wave rumbles through both detectors, Louisiana and Washington.
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Had Robert Schofield worked 40 more minutes that night with the instruments in test mode, a signal that had been on its way for 1.3 billion years would never have been recorded.
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- I like to say, you know, one of my biggest contributions to LIGO has been my laziness that day.
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- I got an email from somebody here saying, "Hey, look at this place on the web." I looked at that and I said, "Holy (beep)." - It was so strong that you could see it by eye in the data.
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It was too good to be true.
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- But it was true.
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In fact, it was loud and surprisingly clear.
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- And it just sang at you.
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Just there it was, standing out.
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- The signal lasted less than a second.
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But in that briefest of moments, it delivered a cosmically profound message more than a billion years in the making, proving the existence of black holes.
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- So what we saw in the signal involved oscillations of the mirrors that were slow at first, became faster and faster and faster.
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And this was precisely the kind of behavior that you would expect from gravitational waves caused by two black holes going around each other, spiraling together.
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- Two massive black holes, one 29 times the mass of the Sun, the other 36 times the mass of the Sun, whipping around each other hundreds of times a second, finally completing their act of mutual destruction by merging, creating a single larger black hole of 62 solar masses.
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The violent merger converts some of the mass into an apocalyptic release of energy beyond anything ever before witnessed.
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- The collision, in effect, creates a veritable storm in the fabric or the shape of space and time.
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As though you had taken three suns, you had annihilated them completely, converted it in to gravitational waves.
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The power was 50 times higher than the output power of all the stars in the universe put together, in a fraction of a second.
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But the most powerful explosion that humans have ever had any evidence for, with the exception of the Big Bang.
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- Since that very first signal in September, 2015, LIGO has detected several more collisions of black holes.
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In October, 2017, Ray Weiss, Kip Thorne, and LIGO's former director, Barry Barish, received the Nobel Prize.
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The LIGO discoveries proved that black holes can merge, one way they can grow bigger quickly.
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- More and more evidence of these merging black holes tells us there are a lot of these stellar black holes around that they can find each other and merge.
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- And the discovery opened an entirely new way of observing the universe.
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- We always thought of astronomy as an observational field where we are looking at radiation, we are seeing things.
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But this is not radiation, this is something much more fundamental.
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These are sort of fundamental tremors in space time itself.
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We can now hear the universe.
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- For the first time, astronomers have simultaneously seen and heard a cosmic event.
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In August, 2017, LIGO detected gravitational waves from a collision of two neutron stars.
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Black holes are empty space, but neutron stars are dense dead stars that can crash together and light up the skies.
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When telescopes and satellites around the globe pointed in the direction of the sound, the world saw fireworks in an explosive collision and afterglow.
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Possibly the collision resulted in the creation of a new black hole.
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But unless we observe the formation of a black hole, there is much we will never know.
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Because so much about black holes is irretrievably out of our reach, we can never know where they came from, what's inside, or their history.
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But we can imagine their future.
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The number of black holes in the universe is increasing, and they're getting bigger.
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Stars collapse, black holes feed and merge, new ones form.
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Could it be that one day everything will end up inside them and they will rule the universe?
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Untold trillions upon trillions of years after this happens and the last bits of matter cross their event horizons, black holes themselves may radiate away and vanish from this reality.
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Their mysteries are many, and we're just starting to unlock the secrets of these strange, powerful places.
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But one thing is certain, black holes will continue to intrigue us, tantalize us, and challenge both our science and our imaginations.
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このレッスンについて
このレッスンでは、宇宙における重力波の発見を通じて、英語のリスニングとスピーキング能力を向上させることを目指します。動画の内容を理解しながら、重要な語彙やフレーズを学び、シャドーイングの練習をすることで、発音やイントネーションを自然に身につけましょう。特に、宇宙や物理学に関する用語に焦点を当て、 IELTS スピーキング対策にも役立つスキルを強化します。
重要な語彙とフレーズ
- 重力波 (gravitational waves): 宇宙の現象に関連する波。
- ブラックホール (black holes): 光さえも脱出できない領域。
- 合体 (merging): 2つの物体が一つになること。
- 観測 (observing): 何かを見る行為。
- 質量 (mass): 物質の量を示す指標。
- エネルギー (energy): 物質が持つ動きの源。
- 宇宙 (universe): 全ての物質とエネルギーを含むもの。
- 信号 (signal): 情報を伝えるためのデータ。
練習のポイント
この動画では、科学者たちが話す速度やトーンが特徴的です。シャドーイングを行う際には、以下のポイントに注意してください：
- スピード: 動画のスピードは速めですが、初めは少し遅くして練習し、慣れてきたら元の速度で試みましょう。
- イントネーション: 各フレーズの強弱を意識し、感情を込めて発音することで、より自然な英語を身につけます。
- 反復練習: 初めて聞いたフレーズを何度も繰り返し、正確に発音できるまで練習しましょう。特に、英語シャドーイングの技法を使って、聞こえた通りに話すことを心がけてください。
- 感情を込める: 科学的な内容でも、語り手の感情を感じ取りながら練習することで、より表現豊かになります。
このレッスンを通じて、英語のシャドースピーチやシャドーイングのスキルを高め、IELTSや他のスピーキングテストに向けた準備を進めましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。